Since you have a higher ball speed, the 3 3/8" pin to pap will give you the strongest core position with the symmetric core. If you use the dual angle method, I might suggest a 60 x 3 3/8" x 40. If you want it a little stronger, then maybe go with 50 x 3 3/8" x 30. I would keep the surface at 2000 or 3000 to help cut through the carry down.

If you have a lack a revs and strong ball speed, a short pin, like 3" - 3.5" should help, but the VAL angle of the Double Angle theory is almost as important, if you're having the troubles you say you are. If you don't know what that means, your driller should plus you may want to read up on it as pin-PAP distance is only part of an important equation.

It's kind of like saying we need air and food and an even temperature/humidity range to live. If you leave out one of those, you're dead